update Makefile, add delta test folder

Author: abdfnx

Makefile

@@ -21,7 +21,7 @@ all: build
 
 .PHONY: build
 build: $(GO_SRC)
-	 $(GO_BUILD) -buildmode=pie -o $(BUILD_DIR)/$(NAME) $(PROJECT)/sample
+	 $(GO_BUILD) -buildmode=pie -o $(BUILD_DIR)/$(NAME) $(PROJECT)/delta
 
 .PHONY: clean
 clean:

delta/delta.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+	"text/tabwriter"
+
+	"github.com/gepis/ps"
+	"github.com/sirupsen/logrus"
+)
+
+func main() {
+	var (
+		descriptors []string
+		pidsList    []string
+		data        [][]string
+		err         error
+
+		pids         = flag.String("pids", "", "comma separated list of process IDs to retrieve")
+		format       = flag.String("format", "", "ps(1) AIX format comma-separated string")
+		list         = flag.Bool("list", false, "list all supported descriptors")
+		join         = flag.Bool("join", false, "join namespace of provided pids (containers)")
+		fillMappings = flag.Bool("fill-mappings", false, "fill the UID and GID mappings with the current user namespace")
+	)
+
+	flag.Parse()
+
+	if *fillMappings && !*join {
+		fmt.Fprintln(os.Stderr, "-fill-mappings requires -join")
+		os.Exit(1)
+	}
+
+	if *list {
+		fmt.Println(strings.Join(ps.ListDescriptors(), ", "))
+		return
+	}
+
+	if *format != "" {
+		descriptors = strings.Split(*format, ",")
+	}
+
+	if *pids != "" {
+		pidsList = strings.Split(*pids, ",")
+	}
+
+	if len(pidsList) > 0 {
+		opts := ps.JoinNamespaceOpts{FillMappings: *fillMappings}
+
+		if *join {
+			data, err = ps.JoinNamespaceAndProcessInfoByPidsWithOptions(pidsList, descriptors, &opts)
+		} else {
+			data, err = ps.ProcessInfoByPids(pidsList, descriptors)
+		}
+
+		if err != nil {
+			logrus.Panic(err)
+		}
+	} else {
+		data, err = ps.ProcessInfo(descriptors)
+		if err != nil {
+			logrus.Panic(err)
+		}
+	}
+
+	tw := tabwriter.NewWriter(os.Stdout, 5, 1, 3, ' ', 0)
+	for _, d := range data {
+		fmt.Fprintln(tw, strings.Join(d, "\t"))
+	}
+
+	tw.Flush()
+}